68 rear speaker package tray cutout?

[70L34]

Hi everyone,

I am reinstalling the rear speaker option on my '68 Z but do not have an original package tray for reference. Would one of you be able to share dimensions on the speaker cutout, and any tips for cutting the tray itself?

Thanks,
Tony

[ds1]

I have a 68 Z28 that came with am radio and rear speaker.  Mine is also gone.  I  would also like to see that

[hrlyfxdl]

Or does anyone know of a good source to show the cutout and installation guide for rear speakers. I want to install in my car as well and make it look original. The AIM illustrations I have seen so far weren't very detailed for the rear speaker set up. My car is a couple.